Reuters is reporting the Pyeongchang Winter Olympics organizers have confirmed a cyber attack occurred during the opening ceremony but are refusing to reveal any attribution:

“We know the cause of the problem but that kind of issues occurs frequently during the Games. We decided with the IOC we are not going to reveal the source (of the attack),” he told reporters.

Russia, which has been banned from the Games for doping, said days before the opening ceremony that any allegations linking Russian hackers to attacks on the infrastructure connected to the Pyeongchang Olympic Games were unfounded.

“We know that Western media are planning pseudo-investigations on the theme of ‘Russian fingerprints’ in hacking attacks on information resources related to the hosting of the Winter Olympic Games in the Republic of Korea,” Russia’s foreign ministry said.

“Of course, no evidence will be presented to the world.”

It makes sense not to publicly announce attribution for this attack until after the games have been completed. There is nothing to gain from discussing it in the open at this juncture. Once the games are finished, a lessons learned and complete after action report on the cyber attacks will be a treasure trove of information extremely useful to Japan for Tokyo 2020.